.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  padding-top: env(safe-area-inset-top, 0px);
  background: color-mix(in srgb, var(--cor-papel-forte) 78%, var(--cor-azul-mar-profundo) 12%);
  backdrop-filter: var(--blur-leve);
  -webkit-backdrop-filter: var(--blur-leve);
  border-bottom: 1px solid color-mix(in srgb, var(--cor-linha) 80%, transparent);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--espaco-md);
  padding-block: var(--espaco-md);
  min-height: 3.75rem;
  flex-wrap: nowrap;
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--fonte-display);
  font-size: 1.35rem;
  font-weight: 560;
  color: var(--cor-azul-mar-profundo);
  text-decoration: none;
  letter-spacing: -0.02em;
  min-width: 0;
  flex-shrink: 1;
}

.site-nav__logo {
  display: block;
  height: 2.35rem;
  width: 2.35rem;
  object-fit: contain;
  flex-shrink: 0;
}

.site-nav__name {
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav__links {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--espaco-md);
  font-weight: 600;
  flex-shrink: 0;
}

.site-nav__links > a {
  text-decoration: none;
  color: var(--cor-tinta-suave);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.site-nav__links > a:hover {
  color: var(--cor-azul-mar);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: 0.25rem;
  padding: 0.2rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--cor-azul-mar-profundo) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--cor-linha) 90%, transparent);
  flex-shrink: 0;
}

.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--cor-tinta-suave);
  line-height: 1;
  box-sizing: border-box;
}

.lang-switch a:hover {
  color: var(--cor-azul-mar-profundo);
  background: color-mix(in srgb, var(--cor-papel) 55%, transparent);
}

.lang-switch a.is-active,
.lang-switch a[aria-current="true"] {
  color: var(--cor-papel);
  background: var(--cor-azul-mar);
}

/* Nav compacta — mobile / tablet estreito */
@media (max-width: 719px) {
  .site-nav__inner {
    gap: 0.45rem;
    padding-block: 0.5rem;
    min-height: 3.15rem;
  }
  .site-nav__logo {
    height: 2rem;
    width: 2rem;
  }
  .site-nav__brand {
    font-size: 1.15rem;
    gap: 0.4rem;
  }
  .site-nav__links {
    gap: 0.25rem 0.55rem;
    font-size: 0.88rem;
  }
  .site-nav__links > a {
    min-height: 44px;
    padding: 0 0.1rem;
  }
  .lang-switch {
    margin-left: 0.05rem;
    padding: 0.1rem;
  }
  .lang-switch a {
    min-width: 2.5rem;
    min-height: 2.5rem;
    font-size: 0.68rem;
    padding: 0 0.28rem;
  }
}

@media (max-width: 479px) {
  .site-nav__name {
    display: none;
  }
  .site-nav__brand {
    gap: 0;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.25rem;
  border-radius: var(--raio-sm);
  border: 1px solid transparent;
  background: var(--cor-azul-mar);
  color: #f5f8f9;
  font: 650 0.95rem/1 var(--fonte-corpo);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  background: var(--cor-azul-mar-profundo);
  color: #f5f8f9;
}

.btn--ghost {
  background: color-mix(in srgb, var(--cor-azul-mar) 10%, var(--cor-papel));
  color: var(--cor-azul-mar-profundo);
  border-color: color-mix(in srgb, var(--cor-azul-mar) 28%, var(--cor-linha));
}

.btn--ghost:hover {
  background: color-mix(in srgb, var(--cor-azul-mar) 16%, var(--cor-papel));
  color: var(--cor-azul-mar-profundo);
}

.btn--wa {
  background: var(--cor-wa);
}

.btn--wa:hover {
  filter: brightness(0.96);
  background: var(--cor-wa);
}

@media (hover: hover) {
  .btn:hover {
    transform: translateY(-1px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:hover { transform: none; }
  .reveal { opacity: 1 !important; transform: none !important; }
}